BLAST FURNACE SLAG LEVEL ESTIMATION METHOD, OPERATION GUIDANCE METHOD, HOT METAL PRODUCTION METHOD, BLAST FURNACE SLAG LEVEL ESTIMATION DEVICE, AND OPERATION GUIDANCE DEVICE

Title:

BLAST FURNACE SLAG LEVEL ESTIMATION METHOD, OPERATION GUIDANCE METHOD, HOT METAL PRODUCTION METHOD, BLAST FURNACE SLAG LEVEL ESTIMATION DEVICE, AND OPERATION GUIDANCE DEVICE

Document Type and Number:

WIPO Patent Application WO/2023/008170

Kind Code:

A1

Abstract:

Provided are a blast furnace slag level estimation method and a blast furnace slag level estimation device that enable highly accurate estimation of the liquid level of slag. Further provided are an operation guidance method, a hot metal production method, and an operation guidance device, for carrying out guidance for a blast furnace operation on the basis of the liquid level of slag that is estimated highly accurately. The blast furnace slag level estimation method includes a step (S2) of calculating the liquid level of a melt containing slag for each of a plurality of domains that are delimited by a low permeable phase, by using a physical model based on a mass balance which takes, as an input, at least one of a pig iron tapping speed, a slag discharge speed, a pig iron production speed and a tailing speed, and which assumes the existence, at the bottom of a furnace, of a low permeable phase which does not readily transmit slag.

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Inventors:

HASHIMOTO YOSHINARI (JP)
MASUDA RYOSUKE (JP)

Application Number:

PCT/JP2022/027308

Publication Date:

February 02, 2023

Filing Date:

July 11, 2022

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C21B5/00; C21B7/24; F27D19/00; F27D21/00

Foreign References:

JP2003155507A	2003-05-30
JP2015206107A	2015-11-19
JP2002294315A	2002-10-09
JPH09227911A	1997-09-02

Other References:

MASAKAZU IIDA, KAZUHIRO OGURA, TETSUI HAKONE: "Numerical Study on Metal/Slag Drainage Rate Deviation during Blast Furnace Tapping", TETSU TO HAGANE: JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, IRON AND STEEL INSTITUTE OF JAPAN. TOKYO., JP, vol. 96, no. 6, 1 June 2010 (2010-06-01), JP , pages 353 - 362, XP009543031, ISSN: 0021-1575, DOI: 10.2355/tetsutohagane.96.353

Attorney, Agent or Firm:

SUGIMURA Kenji (JP)

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